how to view submenu on click using php,html - php

Question

I'm trying to view submenu after click on parent.
Classes->Primary School->(Grade1,Grade2,Grade3,Grade4,Grade5,Grade6)
Classes->Middle School->(Grade7,Grade8,Grade9)
Classes->Secondary School->(Grade10,Grade11,Grade12)
<div class="collapse navbar-collapse" id="main-navigation">
<ul class="nav navbar-nav navbar-right">
<?php foreach ($data as $menu) { ?>
<?php if(!$menu->children) { ?>
<li><?php echo $menu->name; ?></li>
<?php }
else {
?>
<li class="dropdown open">
<a href="#" class="dropdown-toggle " data-toggle="dropdown">
<?php echo $menu->name; ?>
<span class="fa fa-angle-down"></span>
</a>
<ul class="dropdown-menu open" role="menu">
<?php
foreach ($menu->children as $child) {
?>
<li><?php echo $child->name; ?></li>
<?php
foreach ($child->children as $sub_child) {
?>
<li class="dropdown-submenu">
<?php echo $sub_child->name; ?><span class="fa fa-angle-down"></span>
<ul class="dropdown-submenu" role="menu">
<?php } ?>
<?php } ?>
</ul>
</li>
<?php } ?>
<?php } ?>
</ul>
</li>
</ul>
</div>
The result:
Problem with result
I want to view Grade 1 to Grade 6 after click on Primary school and from Grade 7 to Grade 9 after click on Middle school ...
Please help!

Answer 1

You have an open <ul class="dropdown-submenu" role="menu"> tag without any <li> or <a>'s being generated inside of it. Then you close two each statements before closing the <ul> tag.
<?php foreach ($child->children as $sub_child) { ?>
<li class="dropdown-submenu">
<a href="#" style="color:black;" class="dropdown-toggle " data-toggle="dropdown">
<?php echo $sub_child->name; ?><span class="fa fa-angle-down"></span>
</a>
<ul class="dropdown-submenu" role="menu">
<?php } ?>
<?php } ?>
</ul>
</li>
This will be causing all sorts of unintended markup output. Fix that and it should fix your problem. If not, you'll atleast be a lot closer.